522.8.2

[ban-all-sheds]

Why?

 

[ricicle]

From my college days I believe it was to stop debris being drawn into conduits when construction would possibly be ongoing, or the possibility of damage to cables (singles) just being left hanging around.
We probably all know the reality.......

 

[holmslaw]

..

 

[Adam_151]

Regs are out in the van... what does it say ban?

 

[securespark]

Mine also, and I'm naked...(there's a lovely thought for you all)

So I've looked it up on our old mate Google:

"All conduit installations must be erected first before any wiring is installed."

 

[ban-all-sheds]

Can't be rsed to type it verbatim, but it's the one that requires conduit systems to be completely erected between access points before cables are drawn in.

 

[securespark]

I's already said dat!

 

[ban-all-sheds]

You hadn't when I started typing....

 

[ColJack]

522.8.2 Where buried in the structure, a conduit system or cable ducting system, other than a pre-wired conduit assembly specifically designed for the installation, shall be completely erected between access points before any cable is drawn in.

presumably so that you don't damage the cable screwing another box onto the end of a metal conduit, or so that you don't glue the cables in the case of plastic conduit.

given that the previous reg says,

522.8.1 A wiring system shall be selected and erected to avoid during installation, use or maintenance, damage to the sheath or insulation of cables and their terminations.

 

[Stoday]

It ensures that 522.8.6 always applies.

 

[ban-all-sheds]

Ah - now that's a good point.

 

[Paul_C]

It's been a reg in one form or another since the 14th edition

The wording was subtly different then though:

B.88 The conduits for each circuit shall be completely erected before any cable is drawn in. {.....}

And in fact this version of the requirement goes back to before the 14th edition. I don't know when it first appeared, but the exact same wording appears in regulation 218(A) of the 13th edition.

 

[securespark]

Funny I should see this again!

I spoke to someone the other day who reckons his grandad worked to the 10th Ed. and it was in there.

 

[Spark123]

I suppose it would stop muppets from hanging conduit wires like washing lines between points where it is hidden in a wall - yep had one like that not so long back and enjoyed flaming them about it and making them do a 70 mile round trip twice to sort it out.

 

[ericmark]

To make the job harder.

When drawing in alarm cables there was no way one could have ever renewed one cable. Really stuffed in with that Yellow whatever as lub. I am sure anyone who has to work on that system would curse me!

However with so little current it was unlikely to ever have a problem with heat and my boss hadn't a clue what BS7671 was.

Why should we use a RCD with SELV? This shows there are errors so we are free to use common sense.